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Populations and Communities

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Organism   A living thing  
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Habitat   An environment that provides the things an organism needs to live, grow, and reproduce  
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Biotic Factors   The living parts of a habitat  
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Abiotic Factors   The nonliving parts of a habitat  
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Photosynthesis   The process in which plants and algae make food using water, sunlight, and carbon dioxide  
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Species   A group of animals that are physically similar and can mate with each other and produce offspring that can also mate and reproduce  
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Population   All the members of one species in a particular area  
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Community   All the different populations that live together in an area  
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Ecosystem   The community of organisms that live in a particular area along with their nonliving surroundings  
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Ecology   The study of how living things interact with each other and with their environment  
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Estimate   An approximation of a number based on reasonable assumptions  
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Birth Rate   The number of births in a population in a certain amount of time  
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Death Rate   The number of deaths in a population in a certain amount of time  
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Immigration   Moving into a population  
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Population Density   The number of individuals in an area of a specific size  
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Limiting Factor   An environmental factor that causes a population to decrease  
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Carrying Capacity   The largest population an area can support  
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Natural Selection   A process that makes an individual better suited to its environment  
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Adaptions   The behaviors and physical characteristics that allow organisms to live successfully in their environments  
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Niche   The role of an organism in its habitat  
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Competition   The struggle between organisms to survive as they attempt to use the same limiting resource  
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Predation   An interaction in which an organism kills another for food  
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Predator   The organism that does the killing  
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Prey   The organism that is killed  
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Symbiosis   A close relationship between two species that benefits at least one of the species  
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Mutualism   A relationship in which both species benefit  
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Commensalism   A relationship in which one species benefits and the other species is neither helped nor harmed  
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Parasitism   One organism living on or inside another organism and harming it  
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Parasite   The organism that benefits from parasitism  
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Host   The organism a parasite lives on or in  
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Emigration   Leaving a population  
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Created by: hhutchinson
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